[Yuri]

São Paulo:

--- It's an extremely work-oriented city, people are always rushing, so don't you ever walk slowly on sidewalks during weekdays;

--- Leave the left side of subways' escalator free;

--- Don't blink when the traffic lights turn green or cars behind will honk immediately;

--- Don't put ketchup in your pizzas. People in Rio does that for Paulistas horror.

--- Don't call São Paulo "Sampa". People from other parts of the county think it's a "cool", an "insider" expression, but no one in São Paulo calls the city that. Never.